"They were run over by the Bandra Terminus-Indore Express between Malad and Goregaon stations at around 12.20 pm. Another woman, Sunita Gajanan Bhoryalay (35), was injured and admitted to a nearby hospital," said a senior Government Railway Police officer investigating the incident.

The Western Railway dubbed it as a case of trespassing - a term used to describe illegal crossing of tracks.

In a statement, the WR said the four women's site of work was far away from where the incident took place and hence the incident was being seen as a case of "trespassing".

The WR statement added that the four were contractual labourers and not railway employees.